Answer:
What inhibits rainwater seepage into the ground is the concrete floor.
Explanation:
In general, water from rain is usually absorbed by the ground, due to its relative porosity. Concrete is solid and non-porous, forming an impermeable layer that prevents water from passing through it.
Concrete comes from a mixture of cement, sand and water, forming a malleable mass that hardens when dry. It is used for the manufacture of floors and buildings, and is characterized by its relative impermeability.
Other options are not correct because:
Playground, grass lawn and forest land allow the absorption of water from rain.
